21 views Yuda Electronic (HK) Technology Co.,Limited. 2019-11-04
Because of the current industry market, poor quality power adapters account for about 30% of the market. It is a big threat to our factories that make quality products, because the unit price of the power adapter produced from the used original parts will be 30% or more cheaper than the unit price of our new materials. Leading to the current market chaos, some power adapter wholesale manufacturers, although cheap, quality has not received much attention. For the customer, it is a big hidden danger for the consumer of the terminal.
Computer power adapter input voltage range: It is the range of the mains voltage allowed by the power adapter. It is also the mains voltage range that guarantees the normal power supply of the power adapter. The larger the range, the better the adaptability. The input voltage range should be AC 100~240V, especially Tip: It is divided into two working conditions of AC voltage 110V and AC 220V. The correct test mode is to switch the voltage test when the power adapter stops working.
What is the difference between a desktop and a wall-mounted power adapter? In fact, it can be explained simply that a wall-mount power adapter is a power adapter that can be directly plugged into the board. The desktop power adapter is the power adapter that the main body needs to be placed on the desktop. The difference between a desktop power adapter and a wall-mounted power adapter is that the desktop power adapter requires an AC line to connect to the mains.
The input voltage adjustment range of the power adapter is the maximum allowable value of the input mains voltage, generally 90 to 264V AC, corresponding to the range of 90V to 132V AC at 110V, and the range of 176V to 264V AC at 220V.
USB power adapter, in order to avoid the use of the above plugged USB products, resulting in unstable insertion, and the power adapter larger than 36W is not suitable for wall-mounting, because its size and weight are larger, so more than 36W Adopt desktop.
Reducing the area enclosed by the high-voltage and high-current lines, especially the primary side of the transformer and the switching tube and the power supply filter capacitor circuit;
Reducing the area enclosed by the output rectifier circuit and the freewheeling diode circuit and the DC filter circuit;
Reduce the leakage inductance of the transformer and the distributed capacitance of the filter capacitor;
Use a filter capacitor with a high resonance frequency, etc.
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